/* 清除浏览器默认边距，
使边框和内边距的值包含在元素的width和height内 */

ul{
position: fixed;
list-style-type: none;
left:0px;
width: %;
}
li a{
/*将<a>内联元素转换为块级元素，便于padding设定*/
display: block;
/*去掉链接默认样式*/
text-decoration: none;
color: #FFFFFF;
padding: 12px 10px;
background:#3374ab;
}
li a:hover{
background-color: #4c86cd;
color: white;
}
li a.active {
background-color:#496282 ;
 color: white;
}

.fixedBox{
z-index:10;
position:fixed;
left:225px;
top:60px;
width:500px
overflow:hidden;
}

.button{
	background: linear-gradient(to left, #7CB4F7 , #AACCF7);
	color:#fff;
	width: 175px;
	height: 67.5px;
	border:0;
    border-radius: 10px;
    box-shadow:  0px 5px 5px rgba(0, 0, 0,0.2);
    font-size:18px;
}
.button:hover{
    font-size:20px;
    background: linear-gradient(to left, #76ABEB ,#9EBEE6);
    box-shadow: 0 0 10px #6491C7,
        0 0 20px #FFFFFF,
        0 0 40px #FFFFFF,
        0 0 60px #FFFFFF,
        0 0 80px #FFFFFF;

}

.buttondow{
	background-color:#7CB4F7;
	color:#fff;
	width: 200px;
	height: 40px;
	border:0;
    border-radius: 10px;
    font-size:17px;
}

.upload-wrap{
    position: relative;
    display: inline-block;
    overflow: hidden;
    border:1px solid #yellow;
    border-radius: 3px;
}
.upload-wrap .file-ele{
    position: absolute;
    top:0;
    right:0;
    opacity: 0;
    height: 100%;
    width: 100%;
    cursor: pointer;
}
.upload-wrap .file-open{
    width:200px;
    height:40px;
    line-height:40px;
    text-align: center;
    color:#fff;
    background:#7CB4F7;
    border-radius: 10px;
    font-size:17px;
}


* {
    margin: 0 !important;
    padding: 0;
    box-sizing: border-box;


}

/* 使用flex布局，让内容垂直和水平居中 */

section {
    /* 相对定位 */
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    /* linear-gradient() 函数用于创建一个表示两种或多种颜色线性渐变的图片 */
    background: linear-gradient(to bottom, #f0f9ff, #dff1ff);
}

/* 背景颜色 */

section .color {
    /* 绝对定位 */
    position: absolute;
    /* 使用filter(滤镜) 属性，给图像设置高斯模糊*/
    filter: blur(200px);
}

/* :nth-child(n) 选择器匹配父元素中的第 n 个子元素 */

section .color:nth-child(1) {
    top: -350px;
    width: 2000px;
    height: 600px;
    background: #D0F5FF;
}

section .color:nth-child(2) {
    bottom: -150px;
    left: 100px;
    width: 500px;
    height: 500px;
    background: #FFFFFF;
}

section .color:nth-child(3) {
    bottom: 50px;
    right: 100px;
    width: 500px;
    height: 500px;
    background:#FFFFFF;
}

.box {
    position: relative;
}

.box .btn{
    flex-direction:column
}

.container{
    width:500px;
    height:500px;
    display:fixed;
    overflow-x: hidden;
    overflow-y: hidden;
}
.cimage{
    width:500px;
    overflow:hidden;
    max-width:100%;
}

